Optimal Sliding Speed and Contact Pressure Design of On-Load Tap Changer Based on Multivariate Nonlinear Regression

During the voltage regulation of on-load tap changers (OLTCs), the movement of the contacts can easily cause arcing, which may lead to erosion or malfunction. To reduce the energy and probability of arcing, we focus on designing an optimal range for the sliding speed and contact pressure of the cont...

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Bibliographic Details
Published in:Electronics (Basel) 2024-11, Vol.13 (22), p.4349
Main Authors: Xu, Zhiqi, Zhang, Sijiang, Zhang, Jintao, Wang, Xiaobing, Xu, Yanwen, Li, Zongying, Ma, Minghan, Li, Shuaibing
Format: Article
Language:English
Subjects:
Ablation
Aluminum composites
Analysis
Carbon
China
Composite materials
Contact pressure
Correlation coefficients
Design
Dielectric properties
Electric currents
Electric potential
Electric power systems
Electricity distribution
Energy
Laws, regulations and rules
Movement
Regression analysis
Sliding
Sliding friction
Statistical analysis
Tap changers
Voltage
Waveforms
Wear tests
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Summary:During the voltage regulation of on-load tap changers (OLTCs), the movement of the contacts can easily cause arcing, which may lead to erosion or malfunction. To reduce the energy and probability of arcing, we focus on designing an optimal range for the sliding speed and contact pressure of the contacts to minimize arc energy. Initially, our research introduces a novel OLTC arc testing platform to simulate the motion of static and dynamic contacts, exploring the relationship between different sliding speeds, contact pressures, and factors like arc voltage waveform, arcing rate, arc resistance, and arc energy. Subsequently, by employing multiple nonlinear regression methods, we establish functional relationships between sliding speed and arc energy, as well as contact pressure and arc energy, evaluating the fit using correlation coefficients. Finally, through analyzing their nonlinear behaviors, we determine the ideal sliding speed and contact pressure. The results indicate that when the OLTC contacts slide at an optimal speed between 89 and 103 mm/s and optimal contact pressure between 1.5 and 1.7 N, the arc energy can be minimized, thereby enhancing the performance and lifespan of the on-load tap changer. This study offers feasible insights for the design and operation of OLTCs, aiding in the improvement of power system regulation.
ISSN:2079-9292
2079-9292
DOI:10.3390/electronics13224349